杜鹃红山茶花药愈伤组织的诱导

杜鹃红山茶花蕾经4℃低温预处理5～15 d后,用不同消毒剂进行表面消毒.以花药为外植体,MS为基本培养基,研究低温预处理下,花蕾表面消毒方法以及2,4-D与KT、NAA浓度组合对杜鹃红山茶花药愈伤组织诱导的影响.结果表明:4℃低温预处理花蕾的最佳时间为5 d,花蕾的最佳消毒方法为75%乙醇浸洗30 s后,用0.1%升汞消毒10 min;诱导花药愈伤组织的适宜培养基为MS+1.0 mg/L 2,4-D+0.5 mg/L KT和MS+0.5 mg/L2,4-D+0.4 mg/L NAA,于23～25℃暗培养30 d,愈伤组织诱导率分别达34.44%和35.33%.     

云南中部地区几种常见野菜的调查研究

文章对滇中地区6种常见野菜，鱼腥草，蕨菜，大白花杜鹃，荠菜，灰条菜，水蕨菜进行了调查研究，通过民间调查，资料收集，对这些野菜的食用方法，化学及营养成分，药理及毒副作用，开发利用，人工栽培等7个方面进行了研究，为人们的开发利用提出了一些建议。     

海南大学校园植物名录(续三)(活植物标本)

2 15来661朱662带663 222带664带665 222 666带667辛668 223带669带670 671 672 229带673 674 675辛676辛677 230带678 679 680杜鹃花科Ericaceae杜鹃花(映山红,满山红)Rhododendron Simsii Planeh,白花杜鹃紫花杜鹃柿科柿毛柿山榄科人心果(巴斯姑)蛋黄果神秘果紫金牛料珠砂根紫金牛酸果藤细鱼胆木犀科黄素馨扭肚藤茉莉花复瓣茉莉桂花(木犀)夹竹桃科黄蝉长春花白花长春花R。mueronatum G.DonR。Pulehrum Sw。Var.PhoenieeumEb6nacsa6Diospyros Kaki L .f.D。Strigosa Hemsl。SaPotaceaeAehras Sapota(L。)Van Royen。Lueuma nerv…     

形态相似的4 种杜鹃的鉴别

大杜鹃Cuculus canorus,中杜鹃C.saturatus,小杜鹃C.poliocephalus和四声杜鹃C.micropterus通过鸣声可快速鉴别,但这4种杜鹃的形态非常相似,在体长、翅长、尾长、喙长等身体量度指标之间的变异范围有重叠或数值非常接近,鉴别困难.为方便野外鉴别,文章给出了这4种杜鹃的鉴别性外部形态特征及其简易图片辨识方法.4种形态相似的杜鹃种类特征如下:四声杜鹃的尾羽具宽阔的近端黑斑,中杜鹃翼下覆羽的横斑少而不显,大杜鹃的腹部横纹细,而小杜鹃的腹部横纹粗.小杜鹃与四声杜鹃可通过体长、翅长和喙长区分,大杜鹃和小杜鹃也可通过翅长区分.     

一只大杜鹃的走红

正"Flappy的故事让更多的人看到"勇敢的"大杜鹃是如何跨越半个地球来到我们身边,也让更多的人意识到,我们可以做些什么来保护它们所需要的栖身之所。"2016年5月北京市野生动物救护中心、英国鸟类学基金会以及中国观鸟会合作发起了"北京大杜鹃"鸟类环保志愿项目,通过给大杜鹃佩戴卫星发射器来研究国内大杜鹃种群的迁徙情况。其中一只名为Flappy的大杜鹃于2016年在北京翠湖湿地公     

鸟界“神偷”——大杜鹃公审案

正大杜鹃是人们最熟悉的预报春天到来的使者,却也是自然界臭名昭著的鸟界"神偷"。大杜鹃是人们最熟悉的预报春天到来的使者,却也是自然界臭名昭著的鸟界"神偷"。大杜鹃俗称"布谷鸟",鹃形目杜鹃科鸟类,主要分布在欧亚大陆,是我国17种寄生性杜鹃之一。它们多于北回归     

漫话杜鹃“啼血”与“寄卵”

世界上杜鹃科鸟类约130种左右。我国有7种,最常见的是大杜鹃和外形与之相似的四声杜鹃。杜鹃是食虫的益鸟,啄食松毛虫,也吃毒蛾、金龟子等农业害虫,是出色的森林卫士。杜鹃是候鸟,秋季到东南亚等地越冬,春夏来我国繁殖。杜鹃还是一种同我国古老的传说与动情的诗句联系在一起的鸟,一种有着特殊习性的鸟。首先是杜鹃的啼鸣。杜鹃亦名布谷鸟、郭公鸟和喀咕鸟,     

中国杜鹃文献分析

近年来随着我国花卉事业蓬勃发展,从事花卉研发的科技工作者不断增多,尤其是我国著名十大花卉之一杜鹃已成为众多科技工作者的研究科目.本文对所搜集的1994～2008年中国部分学术期刊有关杜鹃的文献进行了分类统计,在此基础上分析了近年来国内杜鹃研究的现状,旨在为我国从事杜鹃研发的科技工作者了解和把握国内杜鹃研究动态提供参考.     

在别人家产卵的大杜鹃在意卵壳颜色吗?

正巢在鸟类一生中具有极其重要的作用,然而,有些鸟却终生不筑巢,如大杜鹃,它只是将卵偷偷地产在其他鸟的巢中。大杜鹃卵的颜色多种多样,寄主的卵色也是五花八门,那么,大杜鹃产卵时,会选择与自己的卵色一致的寄主巢吗?不可或缺的巢在自然界中,绝大多数鸟都会筑巢。常见的家禽(如鸡、鸭、鹅等)在地上产卵,虽然只是     

扫描电镜技术在爵床亚科植物生药学与分类学鉴定中的意义

对板蓝、假杜鹃、可爱花、小驳骨和白花穿心莲5种新鲜爵床亚科植物的叶片进行扫描电镜观察．结果表明：5种爵床亚科植物有共同特征,其下表皮均具有腺鳞和钟乳体,小驳骨的上表皮纹饰和气孔特征与其余4种明显不同．5种植物叶表皮微形态特征的差异,可为爵床亚科植物生药学和分类学鉴定提供新的依据,驳骨草属植物与其他4属植物的亲缘关系可能较远．     

职业学校礼仪教育亟须加强

礼仪，是人类明的重要表现，是社会主义精神明建设的重要组成部分。目前大多数各类职业学校学生讲明、重礼仪的表现并不理想。只有认清现状，找出原因，采取有效措施，加强学生的礼仪教育，才能全面提高学生的素质。     

贺拉斯《诗艺》文艺思想新论

贺拉斯《诗艺》中的文艺思想主要有三个方面：关于文艺的本质问题，他继承了传统的模仿说，又流露出表现说的信息，同时还受到灵感说的影响；关于文艺创作问题——这是主要的方面，他试图为当时文艺创作确立古典主义原则、“合式”原则、理性化原则、道德原则；关于作家修养问题，他要求作家要有德性和知识，要天才和勤奋兼备，要端正创作态度。     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

An Analysis of Catherine＇s Character——Wuthering Heights

Wuthering Heights, Emily Bronte＇s only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

Design and analysis of generic LBS application developing platform

Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-